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Elina [12.6K]
3 years ago
13

To the nearest tent what is the area of circle whose diameter is 21 inches

Mathematics
1 answer:
xxMikexx [17]3 years ago
8 0

Answer:

It depends

Step-by-step explanation:

Area of a circle is given by

A = pi *r^2

We can find the radius by taking 1/2 of the diameter

r= 1/2(21)

r = 10.5

A = pi * (10.5)^2

A = 110.25 pi

Approximating pi with 3.14

A = 110.25 * 3.14

A =346.185 in^2

To the nearest tenth

A = 346.2 in^2

If we use the pi button on the calculator

A = 346.3605901

Rounding to the nearest tenth

A = 346.4 in^2

You need to determine whether you approximate pi by 3.14 or use the pi button on your calculator

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Find the value of x. Round your answer to the nearest tenth.
BlackZzzverrR [31]

Answer:

10.39 or 10.4

Step-by-step explanation:

Since this is a right triangle, you have the formula a squared +b squared = c squared where a and b are the legs and c is the hypotenuse. You plug in the values and you should get sqrt of 108 for x.

8 0
3 years ago
Write 5 next terms:1;2;4;7;11;16​
Alex_Xolod [135]

Answer:

22,29,37,46,56

adding 1, then 2 then 3 and so on

4 0
3 years ago
A motor scooter travels 20 mi in the same time that a bicycle covers 8 mi if the rate of the scooter is 4 mph more than twice th
aleksandr82 [10.1K]

We observe that 20 is 4 more than twice 8. This suggests the time is 1 hour and the rates are

... scooter: 20 mi/h

... bicycle: 8 mi/h

_____

You can let b represent the rate of the bicycle in miles per hour. Then we have (for time in hours and distance in miles) ...

... time = distance/speed

... time = 20/(2b+4) = 8/b

... 20b = 8(2b+4) = 16b +32

... 4b = 32

... b = 8

The rate of the bicycle is 8 mph; that of the scooter is 2*8+4 = 20 mph.

8 0
3 years ago
Pleaseeee help ill give brainly
babunello [35]

Answer:

c

Step-by-step explanation:

hope it helps

7 0
3 years ago
Read 2 more answers
NEEDS TO BE DONE TODAY SOMEONE PLEASE
eduard

Answer:

Step-by-step explanation:

16.

RT=17.885

RS=9.741

Angle T=33°

17

AB=7.077

Angle B= 47.291°

Angle A= 42.709°

19

∠A = 180° - B - C = 1.36944 rad =

A=78.463°

8 0
3 years ago
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